| Value | Category | Cases | |
|---|---|---|---|
| N1 | 14 |
7%
|
|
| N2 | 173 |
86.1%
|
|
| N3 | 7 |
3.5%
|
|
| N4 | 3 |
1.5%
|
|
| N5 | 3 |
1.5%
|
|
| N6 | 1 |
0.5%
|